CDC 2A652 Vol. 4

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2a652 Quizzes & Trivia

Aerospace Ground Equipment Journeyman Common AGE Systems. Edit Code 05.


Questions and Answers
  • 1. 
    What component on the New Generation Heater activates the HCU?
    • A. 

      Oil pressure switch.

    • B. 

      Burner control unit.

    • C. 

      Heat control switch.

    • D. 

      Thermostatic sensor.

  • 2. 
    The HCU on the New Generation heater starts the main air fan for output air when
    • A. 

      A heat setting is selected.

    • B. 

      Constant flame is established.

    • C. 

      The temperature gauge reads cool.

    • D. 

      The inside temperature reaches 140 degrees F.

  • 3. 
    • A. 

      During the engine start up with the ignition switch in PREHEAT position.

    • B. 

      Never, as it will result in serious engine damage.

    • C. 

      When the temperature gauge reads COOL.

    • D. 

      When ambient temperature is below 32 degrees F.

  • 4. 
    Repair of ground heater equipment should never be attempted
    • A. 

      Without first talking with the operator.

    • B. 

      Without first consulting your supervisor.

    • C. 

      Unless accurate technical data is available.

    • D. 

      Unless in the presence of an experienced mechanic.

  • 5. 
    The amount of heat required to raise the temperature of one pound of a substance on degree Fahrenheit is known as
    • A. 

      British thermal unit.

    • B. 

      Sensible unit.

    • C. 

      Specific heat.

    • D. 

      Latent heat.

  • 6. 
    Heat that can be felt and added or subtracted to a substance without changing its state is called
    • A. 

      Super heat.

    • B. 

      Latent heat.

    • C. 

      Specific heat.

    • D. 

      Sensible heat.

  • 7. 
    Heat added to a gaseous substance is known as
    • A. 

      Sensible heat.

    • B. 

      Specific heat.

    • C. 

      Super heat.

    • D. 

      Latent heat.

  • 8. 
    The relationship between pressure and the boiling point of a liquid is seen when
    • A. 

      Pressure increases, it raises the boiling point.

    • B. 

      Pressure increases, it lowers the boiling point.

    • C. 

      The boiling point increases, it raises the pressure.

    • D. 

      The boiling point increases, it lowers the pressure.

  • 9. 
    The factors that have the greatest bearing on the temperature of a refrigerant are the boiling of a liquid and the amount of heat applied and the
    • A. 

      Temperature of the vapor.

    • B. 

      Type of heat transfer.

    • C. 

      Moisture in the air.

    • D. 

      Pressure applied.

  • 10. 
    What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?
    • A. 

      Blower control switch.

    • B. 

      Airflow control switch.

    • C. 

      Evaporator control switch.

    • D. 

      Temperature control switch.

  • 11. 
    What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?
    • A. 

      Liquid refrigerant.

    • B. 

      Gaseous refrigerant.

    • C. 

      Pure water solution.

    • D. 

      Ethylene glycol/water solution.

  • 12. 
    Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a
    • A. 

      Low pressure gas.

    • B. 

      High pressure gas.

    • C. 

      Low pressure liquid.

    • D. 

      High pressure liquid.

  • 13. 
    After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the
    • A. 

      Heatsink coils.

    • B. 

      Condenser coils.

    • C. 

      Evaporator coils.

    • D. 

      Receiver inlet valve.

  • 14. 
    When starting the MA-3D air conditioner, hold the safety override switch until
    • A. 

      30 psi oil pressure is registered on the engine oil pressure gauge.

    • B. 

      You release the start switch.

    • C. 

      The engine warms up.

    • D. 

      The engine starts.

  • 15. 
    What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?
    • A. 

      Air cooler fan.

    • B. 

      Air volume controller.

    • C. 

      Temperature controller.

    • D. 

      Temperature control knob.

  • 16. 
    What component on the MA-3D air conditioner shuts off the compressor when the suction  pressure drops below 5 psi?
    • A. 

      Low pressure cutout.

    • B. 

      High pressure cutout.

    • C. 

      Temperature controller.

    • D. 

      Temperature control switch.

  • 17. 
    What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
    • A. 

      Inward leaks.

    • B. 

      Vacuum leaks.

    • C. 

      Pressure leaks.

    • D. 

      Outward leaks.

  • 18. 
    When performing refrigerant recovery, be sure
    • A. 

      To use vacuum pumps.

    • B. 

      To use the HCU.

    • C. 

      The output air is between 150°F – 185°F.

    • D. 

      The refrigerant has become a low-pressure vapor for compressor use.

  • 19. 
    The air cycle machine of an A/M32C–10D air conditioner consists of
    • A. 

      A air compressor fan only.

    • B. 

      An expansion turbine only.

    • C. 

      A heat exchanger and an expansion turbine.

    • D. 

      An expansion turbine and a compressor fan.

  • 20. 
    The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the
    • A. 

      Compressor.

    • B. 

      Heat exchanger.

    • C. 

      Expansion turbine.

    • D. 

      Temperature controller.

  • 21. 
    The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to
    • A. 

      Ensure the engine is at governed speed before engaging compressor.

    • B. 

      Allow the oil and discharge pressures to stabilize.

    • C. 

      Defrost the evaporator.

    • D. 

      Build-up oil pressure.

  • 22. 
    • A. 

      Condensing refrigerant absorbs heat from the air stream.

    • B. 

      Boiling refrigerant absorbs heat from the air stream.

    • C. 

      Condensing refrigerant looses heat to the air stream.

    • D. 

      Boiling refrigerant looses heat to the air stream.

  • 23. 
    What system on the ACE 802S air conditioner “supercharges” the compressor?
    • A. 

      Defrost.

    • B. 

      Heat boost.

    • C. 

      Vapor injection.

    • D. 

      Liquid injection.

  • 24. 
    What valve must be opened prior to starting the engine on the ACE 802S?
    • A. 

      Air shutoff.

    • B. 

      Fuel shutoff.

    • C. 

      Coolant control.

    • D. 

      Refrigerant flow.

  • 25. 
    What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
    • A. 

      Permit refrigerant pressure to equalize.

    • B. 

      Perform maximum refrigerant pump down.

    • C. 

      Place heating/cooling switch in HEATING position.

    • D. 

      Place the reversing valve lever in the HEATING position.

  • 26. 
     In troubleshooting, what is the first step that must be completed when a unit comes in with a write-up in the forms?
    • A. 

      Isolate the problem.

    • B. 

      Perform a service inspection.

    • C. 

      Perform an operational check.

    • D. 

      Recognize the write-up as a malfunction.

  • 27. 
    How can a restriction in a refrigerant system be identified?
    • A. 

      Frosting at the outlet.

    • B. 

      Sweating of the outlet.

    • C. 

      Increased suction pressure.

    • D. 

      Loosen fittings to check flow.

  • 28. 
    Oil in the rotary vane compressor
    • A. 

      Lubricates the connecting rods.

    • B. 

      Has high viscosity and is very inflammable.

    • C. 

      Forms a seal between the vanes and the stator.

    • D. 

      Permits it to be typed as a high pressure unit.

  • 29. 
    What provides pressurized oil to the rotor blades of the MC-2A rotary sliding vane compressor?
    • A. 

      Hollow-ported bolt.

    • B. 

      Drilled passages.

    • C. 

      Rotor shaft.

    • D. 

      Stator shaft.

  • 30. 
    On the MC-2A rotary sliding vane compressor, the minimum pressure valve does all of the following except
    • A. 

      Ensure minimum pressure within the oil chamber.

    • B. 

      Ensure minimum pressure to the condensate drain.

    • C. 

      Prevent receiver air from flowing back to the compressor by working as a check valve.

    • D. 

      Increase the efficiency of the felt pads by ensuring they receive a constant minimum air pressure.

  • 31. 
    What medium is used to cool the MC-2A rotary vane compressor?
    • A. 

      Oil.

    • B. 

      Air.

    • C. 

      Water.

    • D. 

      Hydraulic fluid.

  • 32. 
    What is the air output of the MC-2A rotary sliding vane compressor?
    • A. 

      High volume, high pressure.

    • B. 

      High volume, low pressure.

    • C. 

      Low volume, high pressure.

    • D. 

      Low volume, low pressure.

  • 33. 
    The valves on a reciprocating compressor are operated by
    • A. 

      Atmospheric pressure.

    • B. 

      Electrical input.

    • C. 

      Oil pressure.

    • D. 

      Pushrods.

  • 34. 
    Oil-moisture traps are required on a multi-stage reciprocating compressor to
    • A. 

      Cool the compressed air.

    • B. 

      Ensure even compression of the air.

    • C. 

      Introduce moisture to the compressed air.

    • D. 

      Remove moisture from the compressed air.

  • 35. 
    During an inspection on an LN2 cart, you should look at all of the following except the
    • A. 

      Brake assembly.

    • B. 

      Engine oil level.

    • C. 

      Unit for cleanliness.

    • D. 

      Front end alignment.

  • 36. 
    When LOX carts are being transported, what position should the vent valve be in?
    • A. 

      Tow.

    • B. 

      Closed.

    • C. 

      Opened.

    • D. 

      Transport.

  • 37. 
    How is the air compressor in the SGNSC categorized?
    • A. 

      High-pressure.

    • B. 

      Low-pressure.

    • C. 

      High volume.

    • D. 

      Low volume.

  • 38. 
    What component on the SGNSC removes nitrogen from the ambient air?
    • A. 

      Filters.

    • B. 

      Carbon absorber.

    • C. 

      Booster compressor.

    • D. 

      Separation membrane.

  • 39. 
    To start the SGNSC, the operator must place the ignition switch in the start position for no more than
    • A. 

      5 seconds.

    • B. 

      10 seconds.

    • C. 

      15 seconds.

    • D. 

      20 seconds.

  • 40. 
    At what storage cylinder pressure, in psig, should the SGNSC nitrogen booster compressor stop?
    • A. 

      2400 psig.

    • B. 

      4100 psig.

    • C. 

      4400 psig.

    • D. 

      6400 psig.

  • 41. 
    • A. 

      2/3 to 3/4 inch from the bottom of the glass.

    • B. 

      2/3 to 3/4 inch from the top of the glass.

    • C. 

      1/2 inch from the bottom of the glass.

    • D. 

      1/2 inch from the top of the glass.

  • 42. 
    During an operational check of an SGNSC you find that the engine starts, is running at 3,000 rpm, but the nitrogen purity does not reach 95.5% within 30 minutes. What is a probable cause of this malfunction?
    • A. 

      Warming door is not lowered for cold weather operating conditions.

    • B. 

      Low oil level in the feed air compressor lubricant separator tank.

    • C. 

      Booster compressor defective.

    • D. 

      Poor air ventilation.

  • 43. 
    What is important to keep in mind when performing maintenance on the SGNSC?
    • A. 

      Weather conditions.

    • B. 

      Wind direction.

    • C. 

      Ventilation.

    • D. 

      Safety.

  • 44. 
    When filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand, the reservoir selector valve must be in the
    • A. 

      Open position.

    • B. 

      Stand position.

    • C. 

      Aircraft position.

    • D. 

      External position.

  • 45. 
    The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the
    • A. 

      Relief valves.

    • B. 

      Aircraft pumps.

    • C. 

      Low pressure filters.

    • D. 

      High pressure pump.

  • 46. 
     In the MJ-2A-1 hydraulic test stand, the output volume of the high pressure pump is controlled by the
    • A. 

      Volume control.

    • B. 

      Flow control valve.

    • C. 

      Compensator control.

    • D. 

      Flowmeter assembly.

  • 47. 
    If the position of the reservoir selector valve is changed in the hydraulic test stand during operation, the operator may cause the
    • A. 

      Flowmeter to be damaged.

    • B. 

      Aircraft reservoir to overfill.

    • C. 

      Flow control valve seals to rupture.

    • D. 

      Return system pressure to decrease.

  • 48. 
    What engine system safety device on the MJ-2A-1 hydraulic test stand sounds the warning horn in the event of an engine system malfunction?
    • A. 

      Water level switch.

    • B. 

      Oil pressure switch.

    • C. 

      Fuel level indicator.

    • D. 

      Fuel pressure switch.

  • 49. 
    When setting the controls for operation of the MJ-2A-1 hydraulic test stand, what control must you set in the OPEN position?
    • A. 

      Compensator control valve.

    • B. 

      Return system bypass valve.

    • C. 

      Supply shut-off valve.

    • D. 

      System selector valve.

  • 50. 
    When filling and bleeding the MJ-2A-1 hydraulic test stand, the system should be pressurized and bled until
    • A. 

      A solid line of fluid can be seen in the sight tube.

    • B. 

      The sight tube is filled with bubbles.

    • C. 

      Sight tube fluid turns a milky color.

    • D. 

      Sight tube fluid is blue in color.

  • 51. 
    What is the most important logical step in troubleshooting a malfunction?
    • A. 

      Analysis.

    • B. 

      Isolation.

    • C. 

      Recognition.

    • D. 

      Verification.

  • 52. 
    • A. 

      Ensure there is no pressure in the system.

    • B. 

      Replace it with the same type of line.

    • C. 

      Mark the location of the line.

    • D. 

      Seal all openings.

  • 53. 
    The volume of oil delivered from the variable displacement hydraulic pump to the fixed displacement hydrostatic motor of the MJ-1B bomblift determines the
    • A. 

      Direction of movement of the lift arms.

    • B. 

      Speed of movement of the lift arms.

    • C. 

      Direction of movement of the truck.

    • D. 

      Speed of movement of the truck.

  • 54. 
    What prevents overpressurization of the steering system of the MJ-1B bomblift?
    • A. 

      Bleed valve.

    • B. 

      Relief valve.

    • C. 

      Bypass valve.

    • D. 

      Pressure regulator.

  • 55. 
    What valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?
    • A. 

      Air bleed.

    • B. 

      Rotary by-pass.

    • C. 

      Counterbalance.

    • D. 

      Over pressurization.

  • 56. 
    As soon as the engine of the MJ-1B starts, you should check for sufficient
    • A. 

      Hydraulic pressure.

    • B. 

      Battery charging.

    • C. 

      Fuel pressure.

    • D. 

      Oil pressure.

  • 57. 
    During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit
    • A. 

      A smooth movement with no binding or no jumping.

    • B. 

      Fast steady movements with minimal jumping.

    • C. 

      Some settling once the actuator is released.

    • D. 

      Small amounts of residue.

  • 58. 
    What is the purpose of the rear control shutoff valve on the MHU-83C/E bomblift?
    • A. 

      Isolates the brake valve.

    • B. 

      Isolates the counterbalance valve.

    • C. 

      Cuts off fluid through the hydrostatic drive.

    • D. 

      Cuts off fluid through the rear control valves.

  • 59. 
    What component on the MHU-83C/E bomblift supplies the brake valve and calipers with fluid?
    • A. 

      System pump.

    • B. 

      Steering pump.

    • C. 

      Transmission pump.

    • D. 

      Hydraulic system control valve.

  • 60. 
    When verifying the proper operation of the centering mechanism on the MHU-83C/E bomblift, the unit should
    • A. 

      Start in reverse.

    • B. 

      Move in neutral.

    • C. 

      Not start in reverse.

    • D. 

      Not move in neutral.

  • 61. 
    You check the backup hydraulic system on the MHU-83C/E bomblift by
    • A. 

      Closing the shutoff valve.

    • B. 

      Operating the hand pump.

    • C. 

      Closing the air bleed valve.

    • D. 

      Operating the system pump.

  • 62. 
    If there is a discrepancy between the workcards and TO, you should refer to
    • A. 

      The TO.

    • B. 

      The workcards.

    • C. 

      Your supervisor.

    • D. 

      Both the TO and workcards.

  • 63. 
    • A. 

      An audible click will be heard and the locking lever will move downward.

    • B. 

      The unit will not move in reverse and an audible click will be heard.

    • C. 

      Locking lever will move upward and an audible click will be heard.

    • D. 

      The unit starts and moves in both directions.

  • 64. 
    When troubleshooting the electrical system on the MJ-1B bomblift, what component will give you a visual indication that the alternator is charging?
    • A. 

      Ammeter.

    • B. 

      Voltmeter.

    • C. 

      Head light.

    • D. 

      Control panel light.

  • 65. 
    The engine safety circuits on the FL-1D shutdown the engine by
    • A. 

      Opening the fuel solenoid.

    • B. 

      Closing the engine intake air.

    • C. 

      Shutting off fuel to the engine.

    • D. 

      Tripping the protective circuit breaker.

  • 66. 
    What is used to raise the mast on the FL-1D?
    • A. 

      Screw mechanism.

    • B. 

      Pneumatic controls.

    • C. 

      Hydraulic cylinder.

    • D. 

      Hand-operated cable.

  • 67. 
    What must you do prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D?
    • A. 

      Secure all doors.

    • B. 

      Warm-up the engine.

    • C. 

      Set the master control switch to ON.

    • D. 

      Position the towbar to the left or right.

  • 68. 
    When a unit comes in with a write-up, how do you verify a malfunction exists?
    • A. 

      Operate the unit.

    • B. 

      Analyze the problem.

    • C. 

      Perform a service inspection.

    • D. 

      Give several probable causes.

  • 69. 
    Where can you find test procedures for a particular component?
    • A. 

      Unit manufacturer’s TO.

    • B. 

      Periodic inspection workcards.

    • C. 

      Service inspection workcards.

    • D. 

      Illustrated parts breakdown.

  • 70. 
    On the outriggers of the split deck maintenance platform, what prevents accidental loss of cylinder extension?
    • A. 

      Electric solenoids.

    • B. 

      Pressure switches.

    • C. 

      Pilot check valve.

    • D. 

      Limit switch.

  • 71. 
    What are the two lifting capacities of the davit (lift pulley) on the maintenance platform?
    • A. 

      150 lbs or 550 lbs.

    • B. 

      250 lbs or 500 lbs.

    • C. 

      550 lbs or 2000 lbs.

    • D. 

      1000 lbs or 2000 lbs.

  • 72. 
    What switch, when turned to the OFF position will prevent all control console functions except platform lowering and engine operation?
    • A. 

      Lift switch.

    • B. 

      Outriggers switch.

    • C. 

      Emergency switch.

    • D. 

      Mode selection switch.

  • 73. 
    When troubleshooting the split deck maintenance platform, how do you bypass the long scissors control cable and operate the control console while observing the test meter?
    • A. 

      Plug the control console directly into the hydraulic control module.

    • B. 

      Disconnect the control console from the hydraulic control module.

    • C. 

      Energize the malfunctioning system.

    • D. 

      Cut the scissors control cable.

  • 74. 
    While operating the split deck maintenance platform you realize the platform will not lower, the probable cause could be
    • A. 

      Corroded battery cables.

    • B. 

      A defective control cable.

    • C. 

      The main disconnect switch is ON.

    • D. 

      The engine switch is in RUN position.

  • 75. 
    What component provides manual speed adjustment on the AF/M32T-1 cabin leakage tester?
    • A. 

      Tachometer.

    • B. 

      Diesel engine.

    • C. 

      Throttle assembly.

    • D. 

      Fuel system relief valve.

  • 76. 
    If the air intake of the AF/M32T-1 cabin leakage tester was restricted, what effect would it have on operation?
    • A. 

      High blower output.

    • B. 

      Low blower output.

    • C. 

      High cabin pressure.

    • D. 

      Correct cabin pressure.

  • 77. 
    What is the reservoir fluid capacity and system pressure of the hydraulic pump on the B-6, 10-ton hydraulic tripod jack?
    • A. 

      2.1 gallons at 2250 psi.

    • B. 

      1.5 gallons at 2200 psi.

    • C. 

      1.1 gallons at 2235 psi.

    • D. 

      1.0 gallons at 1135 psi.

  • 78. 
    What component on the B-1 adjustable aircraft maintenance platform allows the work platform and steps to remain parallel to the base at any desired platform height?
    • A. 

      Base assembly.

    • B. 

      Upper platform.

    • C. 

      Stair support linkage.

    • D. 

      Hydraulic cylinder assembly.

  • 79. 
    What controls the speed of retraction of the hydraulic cylinder assembly on the B-1 adjustable aircraft maintenance platform?
    • A. 

      Handle on the bypass valve.

    • B. 

      Upper structure assembly.

    • C. 

      Flow control valve.

    • D. 

      Pump handle.

  • 80. 
    What type of mechanism does the B-4 adjustable aircraft maintenance platform utilize to raise and lower the platform?
    • A. 

      Screw.

    • B. 

      Scissor.

    • C. 

      Ratchet.

    • D. 

      Pneumatic.

  • 81. 
    What section of the towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear?
    • A. 

      Head adapter assembly.

    • B. 

      Main tube assembly.

    • C. 

      Extension tubes.

    • D. 

      Lift actuator.

  • 82. 
    The purpose of the lift mechanism on the towbar is to
    • A. 

      Adjust the forks.

    • B. 

      Stabilize the main tube assembly.

    • C. 

      Raise and lower the wheel assemblies.

    • D. 

      Engage or disengage the aircraft nose gear.

  • 83. 
    What position would you put the valve handle in to precharge the supply tank of the PMU-29/E oil cart?
    • A. 

      BYPASS.

    • B. 

      OPEN.

    • C. 

      OFF.

    • D. 

      ON.

  • 84. 
    When servicing the hydraulic cart, what prevents large particles in the fluid from entering the reservoir?
    • A. 

      Line filter.

    • B. 

      Check valve.

    • C. 

      Mesh screen.

    • D. 

      Relief valve.

  • 85. 
    Within the universal jack tester control box, what is used to increase the strength of the signals to keep background noise to a minimum?
    • A. 

      Analog digital converter.

    • B. 

      Microprocessor.

    • C. 

      Amplifier.

    • D. 

      Filter.